1 /* dnstap support for Unbound */
4 * Copyright (c) 2013-2014, Farsight Security, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the copyright holder nor the names of its
19 * contributors may be used to endorse or promote products derived from
20 * this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
26 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include "dnstap/dnstap_config.h"
42 #include "ldns/sbuffer.h"
43 #include "util/config_file.h"
44 #include "util/net_help.h"
45 #include "util/netevent.h"
49 #include <protobuf-c/protobuf-c.h>
51 #include "dnstap/dnstap.h"
52 #include "dnstap/dnstap.pb-c.h"
54 #define DNSTAP_CONTENT_TYPE "protobuf:dnstap.Dnstap"
55 #define DNSTAP_INITIAL_BUF_SIZE 256
65 dt_pack(const Dnstap__Dnstap *d, void **buf, size_t *sz)
67 ProtobufCBufferSimple sbuf;
69 memset(&sbuf, 0, sizeof(sbuf));
70 sbuf.base.append = protobuf_c_buffer_simple_append;
72 sbuf.alloced = DNSTAP_INITIAL_BUF_SIZE;
73 sbuf.data = malloc(sbuf.alloced);
74 if (sbuf.data == NULL)
76 sbuf.must_free_data = 1;
78 *sz = dnstap__dnstap__pack_to_buffer(d, (ProtobufCBuffer *) &sbuf);
79 if (sbuf.data == NULL)
87 dt_send(const struct dt_env *env, void *buf, size_t len_buf)
92 res = fstrm_iothr_submit(env->iothr, env->ioq, buf, len_buf,
93 fstrm_free_wrapper, NULL);
94 if (res != fstrm_res_success)
99 dt_msg_init(const struct dt_env *env,
101 Dnstap__Message__Type mtype)
103 memset(dm, 0, sizeof(*dm));
104 dm->d.base.descriptor = &dnstap__dnstap__descriptor;
105 dm->m.base.descriptor = &dnstap__message__descriptor;
106 dm->d.type = DNSTAP__DNSTAP__TYPE__MESSAGE;
107 dm->d.message = &dm->m;
109 if (env->identity != NULL) {
110 dm->d.identity.data = (uint8_t *) env->identity;
111 dm->d.identity.len = (size_t) env->len_identity;
112 dm->d.has_identity = 1;
114 if (env->version != NULL) {
115 dm->d.version.data = (uint8_t *) env->version;
116 dm->d.version.len = (size_t) env->len_version;
117 dm->d.has_version = 1;
122 dt_create(const char *socket_path, unsigned num_workers)
126 struct fstrm_iothr_options *fopt;
127 struct fstrm_unix_writer_options *fuwopt;
128 struct fstrm_writer *fw;
129 struct fstrm_writer_options *fwopt;
131 verbose(VERB_OPS, "opening dnstap socket %s", socket_path);
132 log_assert(socket_path != NULL);
133 log_assert(num_workers > 0);
135 env = (struct dt_env *) calloc(1, sizeof(struct dt_env));
139 fwopt = fstrm_writer_options_init();
140 res = fstrm_writer_options_add_content_type(fwopt,
141 DNSTAP_CONTENT_TYPE, sizeof(DNSTAP_CONTENT_TYPE) - 1);
142 log_assert(res == fstrm_res_success);
144 fuwopt = fstrm_unix_writer_options_init();
145 fstrm_unix_writer_options_set_socket_path(fuwopt, socket_path);
147 fw = fstrm_unix_writer_init(fuwopt, fwopt);
148 log_assert(fw != NULL);
150 fopt = fstrm_iothr_options_init();
151 fstrm_iothr_options_set_num_input_queues(fopt, num_workers);
152 env->iothr = fstrm_iothr_init(fopt, &fw);
153 if (env->iothr == NULL) {
154 verbose(VERB_DETAIL, "dt_create: fstrm_iothr_init() failed");
155 fstrm_writer_destroy(&fw);
159 fstrm_iothr_options_destroy(&fopt);
160 fstrm_unix_writer_options_destroy(&fuwopt);
161 fstrm_writer_options_destroy(&fwopt);
167 dt_apply_identity(struct dt_env *env, struct config_file *cfg)
169 char buf[MAXHOSTNAMELEN+1];
170 if (!cfg->dnstap_send_identity)
173 if (cfg->dnstap_identity == NULL || cfg->dnstap_identity[0] == 0) {
174 if (gethostname(buf, MAXHOSTNAMELEN) == 0) {
175 buf[MAXHOSTNAMELEN] = 0;
176 env->identity = strdup(buf);
178 fatal_exit("dt_apply_identity: gethostname() failed");
181 env->identity = strdup(cfg->dnstap_identity);
183 if (env->identity == NULL)
184 fatal_exit("dt_apply_identity: strdup() failed");
185 env->len_identity = (unsigned int)strlen(env->identity);
186 verbose(VERB_OPS, "dnstap identity field set to \"%s\"",
191 dt_apply_version(struct dt_env *env, struct config_file *cfg)
193 if (!cfg->dnstap_send_version)
196 if (cfg->dnstap_version == NULL || cfg->dnstap_version[0] == 0)
197 env->version = strdup(PACKAGE_STRING);
199 env->version = strdup(cfg->dnstap_version);
200 if (env->version == NULL)
201 fatal_exit("dt_apply_version: strdup() failed");
202 env->len_version = (unsigned int)strlen(env->version);
203 verbose(VERB_OPS, "dnstap version field set to \"%s\"",
208 dt_apply_cfg(struct dt_env *env, struct config_file *cfg)
213 dt_apply_identity(env, cfg);
214 dt_apply_version(env, cfg);
215 if ((env->log_resolver_query_messages = (unsigned int)
216 cfg->dnstap_log_resolver_query_messages))
218 verbose(VERB_OPS, "dnstap Message/RESOLVER_QUERY enabled");
220 if ((env->log_resolver_response_messages = (unsigned int)
221 cfg->dnstap_log_resolver_response_messages))
223 verbose(VERB_OPS, "dnstap Message/RESOLVER_RESPONSE enabled");
225 if ((env->log_client_query_messages = (unsigned int)
226 cfg->dnstap_log_client_query_messages))
228 verbose(VERB_OPS, "dnstap Message/CLIENT_QUERY enabled");
230 if ((env->log_client_response_messages = (unsigned int)
231 cfg->dnstap_log_client_response_messages))
233 verbose(VERB_OPS, "dnstap Message/CLIENT_RESPONSE enabled");
235 if ((env->log_forwarder_query_messages = (unsigned int)
236 cfg->dnstap_log_forwarder_query_messages))
238 verbose(VERB_OPS, "dnstap Message/FORWARDER_QUERY enabled");
240 if ((env->log_forwarder_response_messages = (unsigned int)
241 cfg->dnstap_log_forwarder_response_messages))
243 verbose(VERB_OPS, "dnstap Message/FORWARDER_RESPONSE enabled");
248 dt_init(struct dt_env *env)
250 env->ioq = fstrm_iothr_get_input_queue(env->iothr);
251 if (env->ioq == NULL)
257 dt_delete(struct dt_env *env)
261 verbose(VERB_OPS, "closing dnstap socket");
262 fstrm_iothr_destroy(&env->iothr);
269 dt_fill_timeval(const struct timeval *tv,
270 uint64_t *time_sec, protobuf_c_boolean *has_time_sec,
271 uint32_t *time_nsec, protobuf_c_boolean *has_time_nsec)
274 *time_sec = tv->tv_sec;
275 *time_nsec = tv->tv_usec * 1000;
282 dt_fill_buffer(sldns_buffer *b, ProtobufCBinaryData *p, protobuf_c_boolean *has)
284 log_assert(b != NULL);
285 p->len = sldns_buffer_limit(b);
286 p->data = sldns_buffer_begin(b);
291 dt_msg_fill_net(struct dt_msg *dm,
292 struct sockaddr_storage *ss,
293 enum comm_point_type cptype,
294 ProtobufCBinaryData *addr, protobuf_c_boolean *has_addr,
295 uint32_t *port, protobuf_c_boolean *has_port)
297 log_assert(ss->ss_family == AF_INET6 || ss->ss_family == AF_INET);
298 if (ss->ss_family == AF_INET6) {
299 struct sockaddr_in6 *s = (struct sockaddr_in6 *) ss;
302 dm->m.socket_family = DNSTAP__SOCKET_FAMILY__INET6;
303 dm->m.has_socket_family = 1;
305 /* addr: query_address or response_address */
306 addr->data = s->sin6_addr.s6_addr;
307 addr->len = 16; /* IPv6 */
310 /* port: query_port or response_port */
311 *port = ntohs(s->sin6_port);
313 } else if (ss->ss_family == AF_INET) {
314 struct sockaddr_in *s = (struct sockaddr_in *) ss;
317 dm->m.socket_family = DNSTAP__SOCKET_FAMILY__INET;
318 dm->m.has_socket_family = 1;
320 /* addr: query_address or response_address */
321 addr->data = (uint8_t *) &s->sin_addr.s_addr;
322 addr->len = 4; /* IPv4 */
325 /* port: query_port or response_port */
326 *port = ntohs(s->sin_port);
330 log_assert(cptype == comm_udp || cptype == comm_tcp);
331 if (cptype == comm_udp) {
332 /* socket_protocol */
333 dm->m.socket_protocol = DNSTAP__SOCKET_PROTOCOL__UDP;
334 dm->m.has_socket_protocol = 1;
335 } else if (cptype == comm_tcp) {
336 /* socket_protocol */
337 dm->m.socket_protocol = DNSTAP__SOCKET_PROTOCOL__TCP;
338 dm->m.has_socket_protocol = 1;
343 dt_msg_send_client_query(struct dt_env *env,
344 struct sockaddr_storage *qsock,
345 enum comm_point_type cptype,
349 struct timeval qtime;
351 gettimeofday(&qtime, NULL);
354 dt_msg_init(env, &dm, DNSTAP__MESSAGE__TYPE__CLIENT_QUERY);
357 dt_fill_timeval(&qtime,
358 &dm.m.query_time_sec, &dm.m.has_query_time_sec,
359 &dm.m.query_time_nsec, &dm.m.has_query_time_nsec);
362 dt_fill_buffer(qmsg, &dm.m.query_message, &dm.m.has_query_message);
364 /* socket_family, socket_protocol, query_address, query_port */
365 log_assert(cptype == comm_udp || cptype == comm_tcp);
366 dt_msg_fill_net(&dm, qsock, cptype,
367 &dm.m.query_address, &dm.m.has_query_address,
368 &dm.m.query_port, &dm.m.has_query_port);
370 if (dt_pack(&dm.d, &dm.buf, &dm.len_buf))
371 dt_send(env, dm.buf, dm.len_buf);
375 dt_msg_send_client_response(struct dt_env *env,
376 struct sockaddr_storage *qsock,
377 enum comm_point_type cptype,
381 struct timeval rtime;
383 gettimeofday(&rtime, NULL);
386 dt_msg_init(env, &dm, DNSTAP__MESSAGE__TYPE__CLIENT_RESPONSE);
389 dt_fill_timeval(&rtime,
390 &dm.m.response_time_sec, &dm.m.has_response_time_sec,
391 &dm.m.response_time_nsec, &dm.m.has_response_time_nsec);
393 /* response_message */
394 dt_fill_buffer(rmsg, &dm.m.response_message, &dm.m.has_response_message);
396 /* socket_family, socket_protocol, query_address, query_port */
397 log_assert(cptype == comm_udp || cptype == comm_tcp);
398 dt_msg_fill_net(&dm, qsock, cptype,
399 &dm.m.query_address, &dm.m.has_query_address,
400 &dm.m.query_port, &dm.m.has_query_port);
402 if (dt_pack(&dm.d, &dm.buf, &dm.len_buf))
403 dt_send(env, dm.buf, dm.len_buf);
407 dt_msg_send_outside_query(struct dt_env *env,
408 struct sockaddr_storage *rsock,
409 enum comm_point_type cptype,
410 uint8_t *zone, size_t zone_len,
414 struct timeval qtime;
417 gettimeofday(&qtime, NULL);
418 qflags = sldns_buffer_read_u16_at(qmsg, 2);
421 if (qflags & BIT_RD) {
422 if (!env->log_forwarder_query_messages)
424 dt_msg_init(env, &dm, DNSTAP__MESSAGE__TYPE__FORWARDER_QUERY);
426 if (!env->log_resolver_query_messages)
428 dt_msg_init(env, &dm, DNSTAP__MESSAGE__TYPE__RESOLVER_QUERY);
432 dm.m.query_zone.data = zone;
433 dm.m.query_zone.len = zone_len;
434 dm.m.has_query_zone = 1;
436 /* query_time_sec, query_time_nsec */
437 dt_fill_timeval(&qtime,
438 &dm.m.query_time_sec, &dm.m.has_query_time_sec,
439 &dm.m.query_time_nsec, &dm.m.has_query_time_nsec);
442 dt_fill_buffer(qmsg, &dm.m.query_message, &dm.m.has_query_message);
444 /* socket_family, socket_protocol, response_address, response_port */
445 log_assert(cptype == comm_udp || cptype == comm_tcp);
446 dt_msg_fill_net(&dm, rsock, cptype,
447 &dm.m.response_address, &dm.m.has_response_address,
448 &dm.m.response_port, &dm.m.has_response_port);
450 if (dt_pack(&dm.d, &dm.buf, &dm.len_buf))
451 dt_send(env, dm.buf, dm.len_buf);
455 dt_msg_send_outside_response(struct dt_env *env,
456 struct sockaddr_storage *rsock,
457 enum comm_point_type cptype,
458 uint8_t *zone, size_t zone_len,
459 uint8_t *qbuf, size_t qbuf_len,
460 const struct timeval *qtime,
461 const struct timeval *rtime,
467 log_assert(qbuf_len >= sizeof(qflags));
468 memcpy(&qflags, qbuf, sizeof(qflags));
469 qflags = ntohs(qflags);
472 if (qflags & BIT_RD) {
473 if (!env->log_forwarder_response_messages)
475 dt_msg_init(env, &dm, DNSTAP__MESSAGE__TYPE__FORWARDER_RESPONSE);
477 if (!env->log_resolver_query_messages)
479 dt_msg_init(env, &dm, DNSTAP__MESSAGE__TYPE__RESOLVER_RESPONSE);
483 dm.m.query_zone.data = zone;
484 dm.m.query_zone.len = zone_len;
485 dm.m.has_query_zone = 1;
487 /* query_time_sec, query_time_nsec */
488 dt_fill_timeval(qtime,
489 &dm.m.query_time_sec, &dm.m.has_query_time_sec,
490 &dm.m.query_time_nsec, &dm.m.has_query_time_nsec);
492 /* response_time_sec, response_time_nsec */
493 dt_fill_timeval(rtime,
494 &dm.m.response_time_sec, &dm.m.has_response_time_sec,
495 &dm.m.response_time_nsec, &dm.m.has_response_time_nsec);
497 /* response_message */
498 dt_fill_buffer(rmsg, &dm.m.response_message, &dm.m.has_response_message);
500 /* socket_family, socket_protocol, response_address, response_port */
501 log_assert(cptype == comm_udp || cptype == comm_tcp);
502 dt_msg_fill_net(&dm, rsock, cptype,
503 &dm.m.response_address, &dm.m.has_response_address,
504 &dm.m.response_port, &dm.m.has_response_port);
506 if (dt_pack(&dm.d, &dm.buf, &dm.len_buf))
507 dt_send(env, dm.buf, dm.len_buf);
510 #endif /* USE_DNSTAP */